Add Calculator to Amount Field

[Gaurav_Sarin]

Hi Gurus,
I am working on a project where I am evaluating a scenario where on an Expense Logger app I would like to provide a calculator on the Amount field so my users can directly add the expenses of a certain type calculated while making an entry.

Use case:
Adding grocery expenses can either make individual entries like bread 5$, Carrots 2$, Eggs 10$, celery 3$ or Add a single entry where I add (=5+2+10+3) and finally enter 15$ as groceries.

Right now I have to either make the calculation outside the app or make individual entries